Index for vocabulary

• Rationale
• Full dictionary↗ (In Spanish, at MetroMan’s repository)

Grammar

• Negation and opposites
• Quantifiers

Mathematics

• Numbers Ⅰ
• Numbers Ⅱ
• Arithmetic
• Geometry
  • Orientation
• Set theory
• First order logic (tentative)

Science

• Color
• Body parts
• Plant parts
• Elements↗ (In Spanish, at MetroMan’s website)
• Celestial bodies
• Machines
• Radiation

Social

• Regions
• Politics